package thread;

class MyThread extends Thread {
    @Override
    public void run() {
        while (true) {
            System.out.println("hello thread");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }
    }
}

public class Demo1 {
    public static void main(String[] args) throws InterruptedException {
        // 1. 创建 Thread 类的子类, 在子类中重写 run 方法
        Thread t = new MyThread();
        t.start();

        while (true) {
            System.out.println("hello main");
            Thread.sleep(1000);
        }
    }
}